# Firewall

Depending on the configuration settings Supervisely might send requests to Supervisely services to check for updates or fetch new Supervisely App versions or some other data.

{% hint style="warning" %}
Notice that while some of the domains are deprecated, they are still used in some cases. We recommend to allow all of them.
{% endhint %}

Here is the list of domains and their usage:

* `docker.enterprise.supervisely.com` - responsible for pulling docker images from Supervisely instance
* `hub.docker.com` or `registry.hub.docker.com` or `index.docker.io` - official Docker Hub Registry, responsible for pulling docker images for Supervisely Apps
* `config.enterprise.supervisely.com` - responsible for checking new Supervisely instance versions and instance upgrades
* `app.supervisely.com` - responsible for fetching new Supervisely App versions and its data
* `license.enterprise.supervisely.com` - responsible for syncing the license versions and license upgrades
* `github.com` - some of Supervisely Apps might fetch data from GitHub, like NN models, projects, etc.


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# Agent Instructions: Querying This Documentation

If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question.

Perform an HTTP GET request on the current page URL with the `ask` query parameter:

```
GET https://docs.supervisely.com/enterprise-edition/advanced-tuning/firewall.md?ask=<question>
```

The question should be specific, self-contained, and written in natural language.
The response will contain a direct answer to the question and relevant excerpts and sources from the documentation.

Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.